Sensors

* Models numbers for Through-beam Sensors (E3Z-T[][]) are for sets that include both the Emitter and Receiver.
The model number of the Emitter is expressed by adding "-L" to the set model number (example: E3Z-T61-L 2M), the
model number of the Receiver, by adding "-D" (example: E3Z-T61-D 2M.) Refer to Lineup to confirm model numbers
for Emitter and Receivers.